No, it will actually cost you money over the long term. There are many steps involved in the installation process and nuances that are simply not appreciated by regular homeowners. For instance, synthetic lawn often slopes in a particular direction; you will want them all sloping in the same way in order to avoid a mismatch.
There are many other considerations. The base needs to be properly compacted so no weeds or plants make their way through. The grass needs to be evenly cut and pinned down so the entire area is 100% flush and firmly held down. It’s hard to get this consistency unless you have been cutting and laying synthetic lawn for a long time. The infill also needs to be evenly distributed.